static int rate_to_code PARAMS ((int rate));
static int hardwire_setbaudrate PARAMS ((serial_t scb, int rate));
static int hardwire_write PARAMS ((serial_t scb, const char *str, int len));
-static void hardwire_restore PARAMS ((serial_t scb));
+/* FIXME: static void hardwire_restore PARAMS ((serial_t scb)); */
static void hardwire_close PARAMS ((serial_t scb));
static int get_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
static int set_tty_state PARAMS ((serial_t scb, struct hardwire_ttystate *state));
struct hardwire_ttystate *state;
{
#ifdef HAVE_TERMIOS
+ extern int errno;
pid_t new_process_group;
if (tcgetattr(scb->fd, &state->termios) < 0)
if (!job_control)
return 0;
+ /* Apparently, if a tty has no process group, then tcgetpgrp returns -1 with
+ errno == 0. In this case, set the process group to -1 so that we know to
+ omit resetting it later. */
new_process_group = tcgetpgrp (scb->fd);
- if (new_process_group == (pid_t)-1)
+ if ((new_process_group == (pid_t)-1)
+ && (errno != ENOTTY))
return -1;
+ errno = 0;
state->process_group = new_process_group;
return 0;
#endif
if (!job_control)
return 0;
- return tcsetpgrp (scb->fd, state->process_group);
+ /* If the tty had no process group before, then do not reset it. */
+ if (state->process_group == -1)
+ return 0;
+ else
+ return tcsetpgrp (scb->fd, state->process_group);
#endif
#ifdef HAVE_TERMIO
hardwire_send_break (scb)
serial_t scb;
{
- int status;
-
#ifdef HAVE_TERMIOS
return tcsendbreak (scb->fd, 0);
#endif
#endif
#ifdef HAVE_SGTTY
- status = ioctl (scb->fd, TIOCSBRK, 0);
- usleep (250000);
- status = ioctl (scb->fd, TIOCCBRK, 0);
- return status;
+ {
+ int status;
+ struct timeval timeout;
+
+ status = ioctl (scb->fd, TIOCSBRK, 0);
+
+ /* Can't use usleep; it doesn't exist in BSD 4.2. */
+ /* Note that if this select() is interrupted by a signal it will not wait
+ the full length of time. I think that is OK. */
+ timeout.tv_sec = 0;
+ timeout.tv_usec = 250000;
+ select (0, 0, 0, 0, &timeout);
+ status = ioctl (scb->fd, TIOCCBRK, 0);
+ return status;
+ }
#endif
}
serial_t scb;
int timeout;
{
- int numfds;
-
#ifdef HAVE_SGTTY
struct timeval tv;
fd_set readfds;
while (1)
{
+ int numfds;
+
if (timeout >= 0)
numfds = select(scb->fd+1, &readfds, 0, 0, &tv);
else
/* Read a character with user-specified timeout. TIMEOUT is number of seconds
to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
- char if successful. Returns -2 if timeout expired, EOF if line dropped
- dead, or -3 for any other error (see errno in that case). */
+ char if successful. Returns SERIAL_TIMEOUT if timeout expired, EOF if line
+ dropped dead, or SERIAL_ERROR for any other error (see errno in that case). */
static int
hardwire_readchar(scb, timeout)
{
#if defined (NEED_POSIX_SETPGID) || defined (HAVE_TERMIOS)
/* Do all systems with termios have setpgid? I hope so. */
- retval = setpgid (0, 0);
+ /* setpgid (0, 0) is supposed to work and mean the same thing as
+ this, but on Ultrix 4.2A it fails with EPERM (and
+ setpgid (getpid (), getpid ()) succeeds). */
+ retval = setpgid (getpid (), getpid ());
#else
#if defined (TIOCGPGRP)
#if defined(USG) && !defined(SETPGRP_ARGS)